672973079189 has 4 divisors (see below), whose sum is σ = 712559730924. Its totient is φ = 633386427456.

The previous prime is 672973079173. The next prime is 672973079213. The reversal of 672973079189 is 981970379276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191968412164 + 481004667025 = 438142^2 + 693545^2 .

It is a cyclic number.

It is not a de Polignac number, because 672973079189 - 2⁴ = 672973079173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672973079159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19793325842 + ... + 19793325875.

It is an arithmetic number, because the mean of its divisors is an integer number (178139932731).

Almost surely, 2^672973079189 is an apocalyptic number.

It is an amenable number.

672973079189 is a deficient number, since it is larger than the sum of its proper divisors (39586651735).

672973079189 is a wasteful number, since it uses less digits than its factorization.

672973079189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39586651734.

The product of its (nonzero) digits is 72013536, while the sum is 68.

The spelling of 672973079189 in words is "six hundred seventy-two billion, nine hundred seventy-three million, seventy-nine thousand, one hundred eighty-nine".